Vietnam Exports of bitumen and asphalt (natural), bituminous or oil shale, tar sands to Laos was US$1.06 Million during 2022, according to the United Nations COMTRADE database on international trade. Vietnam Exports of bitumen and asphalt (natural), bituminous or oil shale, tar sands to Laos - data, historical chart and statistics - was last updated on May of 2024.